src/mesa/main/texgen.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file texgen.c
  28  *
  29  * glTexGen-related functions
  30  */
  31
  32
  33 #include "main/glheader.h"
  34 #include "main/context.h"
  35 #include "main/enums.h"
  36 #include "main/macros.h"
  37 #include "main/texgen.h"
  38 #include "main/texstate.h"
  39 #include "math/m_matrix.h"
  40
  41
  42 /**
  43  * Return texgen state for given coordinate
  44  */
  45 static struct gl_texgen *
  46 get_texgen(struct gl_context *ctx, struct gl_fixedfunc_texture_unit *texUnit,
  47            GLenum coord)
  48 {
  49    if (ctx->API == API_OPENGLES) {
  50       return (coord == GL_TEXTURE_GEN_STR_OES)
  51          ? &texUnit->GenS : NULL;
  52    }
  53
  54    switch (coord) {
  55    case GL_S:
  56       return &texUnit->GenS;
  57    case GL_T:
  58       return &texUnit->GenT;
  59    case GL_R:
  60       return &texUnit->GenR;
  61    case GL_Q:
  62       return &texUnit->GenQ;
  63    default:
  64       return NULL;
  65    }
  66 }
  67
  68
  69 void GLAPIENTRY
  70 _mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
  71 {
  72    struct gl_fixedfunc_texture_unit *texUnit;
  73    struct gl_texgen *texgen;
  74    GET_CURRENT_CONTEXT(ctx);
  75
  76    if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
  77       _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
  78                   _mesa_enum_to_string(coord),
  79                   _mesa_enum_to_string(pname),
  80                   *params,
  81                   _mesa_enum_to_string((GLenum) (GLint) *params));
  82
  83    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
  84       _mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)");
  85       return;
  86    }
  87
  88    texUnit = _mesa_get_fixedfunc_tex_unit(ctx, ctx->Texture.CurrentUnit);
  89
  90    texgen = get_texgen(ctx, texUnit, coord);
  91    if (!texgen) {
  92       _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
  93       return;
  94    }
  95
  96    switch (pname) {
  97    case GL_TEXTURE_GEN_MODE:
  98       {
  99          GLenum mode = (GLenum) (GLint) params[0];
 100          GLbitfield bit = 0x0;
 101          if (texgen->Mode == mode)
 102             return;
 103          switch (mode) {
 104          case GL_OBJECT_LINEAR:
 105             bit = TEXGEN_OBJ_LINEAR;
 106             break;
 107          case GL_EYE_LINEAR:
 108             bit = TEXGEN_EYE_LINEAR;
 109             break;
 110          case GL_SPHERE_MAP:
 111             if (coord == GL_S || coord == GL_T)
 112                bit = TEXGEN_SPHERE_MAP;
 113             break;
 114          case GL_REFLECTION_MAP_NV:
 115             if (coord != GL_Q)
 116                bit = TEXGEN_REFLECTION_MAP_NV;
 117             break;
 118          case GL_NORMAL_MAP_NV:
 119             if (coord != GL_Q)
 120                bit = TEXGEN_NORMAL_MAP_NV;
 121             break;
 122          default:
 123             ; /* nop */
 124          }
 125          if (!bit) {
 126             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 127             return;
 128          }
 129          if (ctx->API != API_OPENGL_COMPAT
 130              && (bit & (TEXGEN_REFLECTION_MAP_NV | TEXGEN_NORMAL_MAP_NV)) == 0) {
 131             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 132             return;
 133          }
 134
 135          FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE);
 136          texgen->Mode = mode;
 137          texgen->_ModeBit = bit;
 138       }
 139       break;
 140
 141    case GL_OBJECT_PLANE:
 142       {
 143          if (ctx->API != API_OPENGL_COMPAT) {
 144             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 145             return;
 146          }
 147          if (TEST_EQ_4V(texgen->ObjectPlane, params))
 148             return;
 149          FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE);
 150          COPY_4FV(texgen->ObjectPlane, params);
 151       }
 152       break;
 153
 154    case GL_EYE_PLANE:
 155       {
 156          GLfloat tmp[4];
 157
 158          if (ctx->API != API_OPENGL_COMPAT) {
 159             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 160             return;
 161          }
 162
 163          /* Transform plane equation by the inverse modelview matrix */
 164          if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
 165             _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
 166          }
 167          _mesa_transform_vector(tmp, params,
 168                                 ctx->ModelviewMatrixStack.Top->inv);
 169          if (TEST_EQ_4V(texgen->EyePlane, tmp))
 170             return;
 171          FLUSH_VERTICES(ctx, _NEW_TEXTURE_STATE);
 172          COPY_4FV(texgen->EyePlane, tmp);
 173       }
 174       break;
 175
 176    default:
 177       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
 178       return;
 179    }
 180
 181    if (ctx->Driver.TexGen)
 182       ctx->Driver.TexGen( ctx, coord, pname, params );
 183 }
 184
 185
 186 void GLAPIENTRY
 187 _mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
 188 {
 189    GLfloat p[4];
 190    p[0] = (GLfloat) params[0];
 191    if (pname == GL_TEXTURE_GEN_MODE) {
 192       p[1] = p[2] = p[3] = 0.0F;
 193    }
 194    else {
 195       p[1] = (GLfloat) params[1];
 196       p[2] = (GLfloat) params[2];
 197       p[3] = (GLfloat) params[3];
 198    }
 199    _mesa_TexGenfv(coord, pname, p);
 200 }
 201
 202
 203 void GLAPIENTRY
 204 _mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
 205 {
 206    GLfloat p[4];
 207    p[0] = (GLfloat) param;
 208    p[1] = p[2] = p[3] = 0.0F;
 209    _mesa_TexGenfv( coord, pname, p );
 210 }
 211
 212
 213 void GLAPIENTRY
 214 _es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
 215 {
 216    _mesa_GetTexGenfv(GL_S, pname, params);
 217 }
 218
 219
 220 void GLAPIENTRY
 221 _es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
 222 {
 223    if (coord != GL_TEXTURE_GEN_STR_OES) {
 224       GET_CURRENT_CONTEXT(ctx);
 225       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx](pname)" );
 226       return;
 227    }
 228    /* set S, T, and R at the same time */
 229    _mesa_TexGenf(GL_S, pname, param);
 230    _mesa_TexGenf(GL_T, pname, param);
 231    _mesa_TexGenf(GL_R, pname, param);
 232 }
 233
 234
 235 void GLAPIENTRY
 236 _es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
 237 {
 238    if (coord != GL_TEXTURE_GEN_STR_OES) {
 239       GET_CURRENT_CONTEXT(ctx);
 240       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx]v(pname)" );
 241       return;
 242    }
 243    /* set S, T, and R at the same time */
 244    _mesa_TexGenfv(GL_S, pname, params);
 245    _mesa_TexGenfv(GL_T, pname, params);
 246    _mesa_TexGenfv(GL_R, pname, params);
 247 }
 248
 249
 250 void GLAPIENTRY
 251 _mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
 252 {
 253    GLfloat p[4];
 254    p[0] = (GLfloat) params[0];
 255    if (pname == GL_TEXTURE_GEN_MODE) {
 256       p[1] = p[2] = p[3] = 0.0F;
 257    }
 258    else {
 259       p[1] = (GLfloat) params[1];
 260       p[2] = (GLfloat) params[2];
 261       p[3] = (GLfloat) params[3];
 262    }
 263    _mesa_TexGenfv( coord, pname, p );
 264 }
 265
 266
 267 void GLAPIENTRY
 268 _mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
 269 {
 270    GLfloat p[4];
 271    p[0] = param;
 272    p[1] = p[2] = p[3] = 0.0F;
 273    _mesa_TexGenfv(coord, pname, p);
 274 }
 275
 276
 277 void GLAPIENTRY
 278 _mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
 279 {
 280    GLint p[4];
 281    p[0] = param;
 282    p[1] = p[2] = p[3] = 0;
 283    _mesa_TexGeniv( coord, pname, p );
 284 }
 285
 286
 287
 288 void GLAPIENTRY
 289 _mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
 290 {
 291    struct gl_fixedfunc_texture_unit *texUnit;
 292    struct gl_texgen *texgen;
 293    GET_CURRENT_CONTEXT(ctx);
 294
 295    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 296       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)");
 297       return;
 298    }
 299
 300    texUnit = _mesa_get_fixedfunc_tex_unit(ctx, ctx->Texture.CurrentUnit);
 301
 302    texgen = get_texgen(ctx, texUnit, coord);
 303    if (!texgen) {
 304       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
 305       return;
 306    }
 307
 308    switch (pname) {
 309    case GL_TEXTURE_GEN_MODE:
 310       params[0] = ENUM_TO_DOUBLE(texgen->Mode);
 311       break;
 312    case GL_OBJECT_PLANE:
 313       COPY_4V(params, texgen->ObjectPlane);
 314       break;
 315    case GL_EYE_PLANE:
 316       COPY_4V(params, texgen->EyePlane);
 317       break;
 318    default:
 319       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
 320    }
 321 }
 322
 323
 324
 325 void GLAPIENTRY
 326 _mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
 327 {
 328    struct gl_fixedfunc_texture_unit *texUnit;
 329    struct gl_texgen *texgen;
 330    GET_CURRENT_CONTEXT(ctx);
 331
 332    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 333       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)");
 334       return;
 335    }
 336
 337    texUnit = _mesa_get_fixedfunc_tex_unit(ctx, ctx->Texture.CurrentUnit);
 338
 339    texgen = get_texgen(ctx, texUnit, coord);
 340    if (!texgen) {
 341       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
 342       return;
 343    }
 344
 345    switch (pname) {
 346    case GL_TEXTURE_GEN_MODE:
 347       params[0] = ENUM_TO_FLOAT(texgen->Mode);
 348       break;
 349    case GL_OBJECT_PLANE:
 350       if (ctx->API != API_OPENGL_COMPAT) {
 351          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
 352          return;
 353       }
 354       COPY_4V(params, texgen->ObjectPlane);
 355       break;
 356    case GL_EYE_PLANE:
 357       if (ctx->API != API_OPENGL_COMPAT) {
 358          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
 359          return;
 360       }
 361       COPY_4V(params, texgen->EyePlane);
 362       break;
 363    default:
 364       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
 365    }
 366 }
 367
 368
 369
 370 void GLAPIENTRY
 371 _mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
 372 {
 373    struct gl_fixedfunc_texture_unit *texUnit;
 374    struct gl_texgen *texgen;
 375    GET_CURRENT_CONTEXT(ctx);
 376
 377    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 378       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)");
 379       return;
 380    }
 381
 382    texUnit = _mesa_get_fixedfunc_tex_unit(ctx, ctx->Texture.CurrentUnit);
 383
 384    texgen = get_texgen(ctx, texUnit, coord);
 385    if (!texgen) {
 386       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
 387       return;
 388    }
 389
 390    switch (pname) {
 391    case GL_TEXTURE_GEN_MODE:
 392       params[0] = texgen->Mode;
 393       break;
 394    case GL_OBJECT_PLANE:
 395       if (ctx->API != API_OPENGL_COMPAT) {
 396          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
 397          return;
 398       }
 399       params[0] = (GLint) texgen->ObjectPlane[0];
 400       params[1] = (GLint) texgen->ObjectPlane[1];
 401       params[2] = (GLint) texgen->ObjectPlane[2];
 402       params[3] = (GLint) texgen->ObjectPlane[3];
 403       break;
 404    case GL_EYE_PLANE:
 405       if (ctx->API != API_OPENGL_COMPAT) {
 406          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
 407          return;
 408       }
 409       params[0] = (GLint) texgen->EyePlane[0];
 410       params[1] = (GLint) texgen->EyePlane[1];
 411       params[2] = (GLint) texgen->EyePlane[2];
 412       params[3] = (GLint) texgen->EyePlane[3];
 413       break;
 414    default:
 415       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
 416    }
 417 }